Experimental and numerical studies on post-fracture behavior of simply supported composite twin I-girder bridges

Heang Lam*, Weiwei Lin, Teruhiko Yoda

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review


This study is carried out to investigate the post-fracture behavior of the composite twin I-girder bridge systems. In the experimental program, one intact specimen and one damage specimen were tested under static load with displacement control method. Different cases of fractures are performed in numerical analyses based on finite element method and nonlinear analyses. Significant reduction of system stiffness and load carrying capacity is observed in post-fracture condition. The failure modes of both intact and damage specimen are governed by the crush of the concrete slab. Nevertheless, composite twin I-girder bridge system will not collapse under dead load and be able to carry a certain level of live load. Numerical analyses for different damage conditions proved that the fracture at mid-span section is the most fracture critical location for composite twin I-girder bridge system.

Original languageEnglish
Title of host publicationIABSE Conference, Vancouver 2017
Subtitle of host publicationEngineering the Future - Report
PublisherInternational Association for Bridge and Structural Engineering
Number of pages8
ISBN (Electronic)9783857481536
Publication statusPublished - 1 Jan 2017
MoE publication typeA4 Conference publication
EventIABSE Symposium: Engineering the Future - Vancouver, Canada
Duration: 21 Sept 201723 Sept 2017
Conference number: 39


ConferenceIABSE Symposium


  • Composite twin I-girder bridge
  • Fracture critical location
  • Post-fracture behavior


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